Mathematics for IGCSE & O level - Number (Section 1 - No. 25)

Which statement about prime numbers is correct?

Every even number greater than 2 is prime.

All prime numbers are odd.

There are infinitely many prime numbers.

The sum of two prime numbers is always prime.

The definition of a prime number states that it has exactly two factors, 1 and itself. There are infinitely many prime numbers.